No Head for Numbers

New Insight into How We Count: A recent functional MRI study gives us a new appreciation for the fact that specific brain circuitry underlies processing ‘how many’ (and that it is different from how we process ‘how much’). The intraparietal sulcus lights up with the former taks but not the latter when they are cleverly distinguished by the study design. The region may be involved with the learning disorder called dyscalculia, which affects perhaps 6% of the public and involves difficulty envisioning numerical sequences and even distinguishing which of two numbers is bigger. Dyscalculia is not the only way in which someone might have difficulty with calculation and other mathematics, but it is the most severe. (Yahoo! News)